Audi A8 (D3) (2002-2009) - fuse box

Audi A8 (D3) (2002-2009) – fuse box

Posted on August 1, 2022

Audi A8 (D3) (4E) – fuse box diagram

Year of manufacture: 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009.

The cigarette lighter fuse in the Audi A8 D3 is fuse No. 36/20A and fuse No. 37/20A in fuse box No. 2 in the passenger compartment.

Locations

  1. The fuse box on the left dashboard;
  2. Relay and fuse box in the engine compartment;
  3. Relay and fuse box behind the dashboard;
  4. Fuse box on the right side of the dashboard;
  5. Fuses on the rack on the right;
  6. Fuse box at passenger’s foot;
  7. 8. 9. 10. – Relay and fuse blocks in the trunk on the left and right sides, respectively.

Fuse box in the passenger compartment on the left side.

Diagram of the fuse box

Number Amps [A] Description
1 5A Garage door opener (HomeLInk)
2 5A Park assist control unit
3 5A Park assist control unit
4 10 A Headlight range control
5 5A Instrument panel
6 10 A Steering column control unit
7 5A On-board diagnostics
8 5A Oil level and temperature sensor;

On-board diagnostics.
9 5A ABS control unit;

Steering column control unit.
10 5A Data link connector
11 10 A Lane detection control unit
12 5A Stoplights
13 10 A Telephone control unit;

Telematics.
14 5A Special vehicle control unit
15 5A Launch authorization control unit
16 10 A Rear entertainment in the car
17 5A Adaptive cruise control unit
18 5A Heated windshield washer nozzles
19 10 A Special vehicle control unit
20 5A Tire pressure monitoring system
21 5A Special vehicle control unit
22 5A Brake pedal switch
23 5A Phone
24 15A Horn
25 40A Wiper motor
26 15A Special vehicle control unit
27 25A ABS control unit
28 Unused
29 1A Lighting, switch(es)
30 Unused
31 30A Power control unit
32 5A Information display control
33 25A Rear left leg heater
34 Unused
35 Unused
36 5A Lane change assistant control unit
37 15A Refrigeration box
38 30A Power control unit
39 7,5A Left front door controller
40 25A Power control unit;

Steering column adjustment, vertical;

Steering column adjustment, horizontal.
41 7,5A Left rear door controller
42 25A Input and activation of authorization control unit
43 10 A Left turn signal
44 10 A Right turn signal

Fuse box 2 in the passenger compartment on the right side

Diagram of the fuse box

Number Amps [A] Description
1 5A Parking brake control unit
2 10 A Climatronic control unit
3 5A Tiptronic switch;

“P” position switch (automatic transmission);

Shift lever lock solenoid.
4 15A Automatic transmission control unit
5 15A Mass flow meter;

Secondary air pump relay;

Intake manifold valve control motor;

Throttle control motor with position sensor;

Exhaust gas recirculation solenoid;

Turbocharger controller;

Secondary air inlet valve;

Motor mounting solenoid;

Torque converter clutch solenoid (automatic transmission);

Spin control solenoid;

Intake manifold shut-off valve.
6 15A Oxygen sensor before catalytic converter;

Oxygen sensor after catalytic converter.
7 15A Lambda probe after catalytic converter;

Fuel pressure control solenoid valve;

Fuel metering solenoid valve.
8 10 A Throttle control motor with position sensor;

Intake manifold valve control motor;

Motor mounting solenoid;

Intake valve camshaft adjustment solenoid;

Exhaust gas recirculation solenoid valve;

Exhaust flap valve;

Clutch solenoid of the torque converter (automatic transmission);

Coolant circulation pump;

Centrifugation control solenoid valve;

Intake manifold shut-off valve.
9 5A Rear seat heating switch;

Front passenger seat heating switch;

Air quality sensor;

Climatronic button;

TCS/ESP.
10 10 A Adaptive damping control unit
11 5A Rain and light sensor
12 5A Vehicle information control unit
(also 7.5 A)
13 10 A Control unit, roof electronics
14 5A CD changer;

DVD drive, CD-ROM drive.
15 5A Power management control unit
16 5A Crankcase breather heater
(also 7.5 A)
17 5A Cooling system
18 5A Airbag control unit;

Map reading lamp(s).
19 5A Air mass flow meter
20 5A Ventilation control;

Center console.
21 5A Motor Controller Main Relay
(also 5A)
22 10 A Fuel cooling pump;

Fuel coolant pump relay.
23 5A Parking brake control unit
24 10 A Power control unit
(also used 20A)
25 15A Automatic transmission control unit
26 15A Rear air conditioning system controller

(also 10 A)
27 20A Sliding roof controller
28 15A Fuel pump relay;

Fuel pump relay #2;

Brake servo relay;

Motor control unit
(also 5A).
29 30A Injectors
(also 15A)
30 20A Ignition coils;

Engine control unit.
31 15A Canister purge solenoid valve;

Additional fuel pump;

Fuel pump controller
(also 40A).
32 25A Automatic transmission controller
(also 10A and 5A)
33 25A Right rear leg warmer
34 20A Heated rear seats;

Seat ventilation;

Climatronic.
35 20A Climatronic air conditioning controller;

Seat heating controller.
36 20A Lighter
37 20A 12V cigarette lighter socket
(also 30A and 25A)
38 20A Cooling fan
39 15A Left front door controller
(also 7.5 A)
40 15A Brake servo relay;

Brake vacuum pump.
41 15A Right rear door controller
(also 7.5 A)
42 20A Additional heater
43 20A Headlight washer relay
(also 30 A)
44 15A Air conditioning blower;

Trailer connector socket
(30A also used).

Fuse and relay #2 in the passenger compartment (passenger legroom)

Number Amps [A] Description
1 30A Right front window
2 30A Seat adjustment
3 30A Blower;

Front right window
4 30A Seat adjustment
5 Unused
6 Unused
R1 Cooling fan relay;

Fuel cooling pump relay;

Brake servo relay;

Relay, auxiliary coolant pump;

Coolant circulation relay.
R2 Starter motor relay
R3 Starter motor relay
R4 Fuel pump relay;

Power supply relay.
R5 Headlight washer relay

Main fuse in the passenger compartment in the legroom (right side)

Fuse 1 (60.0 A) – Cooling fan
Fuse 2 (60.0 A) – Cooling fan 2

Fuse box in the trunk on the left side

Number Amps [A] Description
1 Unused
2 Unused
3 Unused
4 Unused
5 30A Digital audio package control unit
6 5A Navigation control unit
7 10 A TV tuner
8 5A Reversing camera system
9 5A Radio
10 15A Subwoofer control unit
(also 30 A)
11 20A 12V socket
12 15A Additional heater remote control receiver

Fuse box in the trunk on the right side

Number Amps [A] Description
A 40A Heated rear window
b 30A Rear seat adjustment
(also 40A)
C 30A Rear seat adjustment
D 15A Communication system
1 20A Fuel pump
2 20A Fuel pump
3 15A Trailer connector socket
4 5A GPS system
5 20A Comfort system control unit
6 10 A Comfort system control unit
7 20A Comfort system control unit
8 30A Electric parking brake
9 30A Electric parking brake
10 15A Trailer detection control unit
(also 20A)
11 15A Trailer detection control unit
(also 20A)
12 15A Trailer detection control unit
Fuse 1 150A Power supply
Fuse 2 60A Radio;

Navigation System;

TV Tuner.
Fuse 3 110 Heated rear window
R1 Heated rear window relay
R2 Power relay
R3 Fuel pump relay;

Fuel pump relay #2;

Additional fuel pump relay.

Fuse and relay box in the engine compartment

Number Amps [A] Description
1 Unused
2 50 Secondary air pump;

Glow plug
(also 60 A)
(also 80 A)
3 50 Secondary air pump;

Glow plug
(also 60 A)
(also 80 A).
4 Unused
5 Unused
6 Unused
7 Unused
R1 Glow plug relay;

Secondary air pump relay
R2 Glow plug relay;

Secondary air pump relay;

Main Relay.
R3 Glow plug relay;

Secondary air pump relay;

Main Relay.
R4 Unused

Fuse and relay box on the left side of the driver’s legroom

Number Amps [A] Description
1 60A ABS control unit
2 40A Leveling system
3 30A Windshield lifter
(also 40A used)
4 30A Seat adjustment
5 30A Seat adjustment
6 Unused
7 Unused
8 Unused
R1 Adaptive suspension compressor relay
R2 Horn relay
R3 Voltage supply relay of terminal 15
R4 Washer fluid heater relay
R5 Alarm system control unit (cab)
R6 Voltage supply relay terminal 75
R7
R8
R9
R10

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